which exhaust? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > which exhaust?

NEW JK WRANGLER GRAB BARS NOW at ROCKRIDGE4WDROCKRIDGE4WD Introduces a NEW Jeep Wrangler JK *led* tail Ruffstuff XJ Unirail Channel Reinforcement....

Reply
Unread 09-27-2001, 11:27 AM   #1
lostboy
Registered User
 
Join Date: May 2001
Location: NY
Posts: 533
which exhaust?

I'm changing the the 4.2 head to the 4.0 head in a '89 yj. Which exhaust will work with this application? is the Borla header worth the extra bucks? and which model would I order ?. I will need the o2 sensor port.

__________________
89 yj w/ mopar mpi and 4.0 head.94 ax-15 tranny and t-case, more mods comin.
lostboy is offline   Reply With Quote Quick reply to this message
Unread 09-27-2001, 01:25 PM   #2
Nightclaw
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2001
Location: Oceanside, CA, USA
Posts: 150
I've not been exceptionally impressed with the build quality of Borla headers I've seen in the past. The header tubes seem a bit thin, and I'm leery of their welds. However, it's been a while, so maybe they've improved since I last experienced one...?

Personally, I have a Thorley header and I love it. The part number is 634Y for F.I. heads. If your 4.0 head is off a fuelie Jeep, it should bolt right on.

Both the Thorley and the Borla have CARB EO numbers, and thus both have the O2 bung.
__________________
=========
[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares
Nightclaw is offline   Reply With Quote Quick reply to this message
Unread 09-27-2001, 05:10 PM   #3
hardoncj5
Registered User
 
Join Date: Sep 2001
Location: GREECE
Posts: 9
borlas work fine, but i believe custom made exhaust systems (by a specialist-important) can optimize the performance in the best way
hardoncj5 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.